Method and apparatus for wire termination on outwardly spooled multi-pole stators

ABSTRACT

A method and device for wire termination on stators ( 1 ) wherein the wire ( 15 ) is wound about poles ( 6 ) distributed by a flier ( 10 ), guided by shrouds ( 16 ) that move radially with respect to the stator ( 1 ) overlapping the respective pole ( 6 ). Wire termination operations are provided on the wire ends ( 15 ) into the terminals ( 4 ) with the aid of the flier ( 10 ), carried out by an apparatus equipped with a termination device ( 20 ), comprising a first deflector ( 21 ), a second deflector ( 22 ), a blade ( 23 ), and a clamp formed by a movable gripper ( 24 ) and a fixed gripper ( 25 ). The movable gripper is suitable for closing onto the fixed gripper for gripping the wire ( 15 ). The device ( 20 ) can carry out the steps of catching, moving, introducing and cutting the wire ( 15 ) with movements parallel to its own axis ( 27 ), or to the axis ( 7 ) of the stator ( 1 ).

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. application Ser. No.10/406,471, filed on Apr. 3, 2003, which application claims foreignpriority under 35 U.S.C. §119 to European Patent Application No.02425221.5, which application was filed on Apr. 10, 2002.

FIELD OF THE INVENTION

The present invention relates to the field of stator winding machines,and precisely it relates to a method for wire termination on outwardlyspooled multi-pole stators. Furthermore, the invention relates to anapparatus that carries out this method.

BACKGROUND OF THE INVENTION

Outwardly spooled multi-pole stators are known, formed by asubstantially star-shaped stack of sheets featuring a plurality of polesextending from a tubular core. The stators of this type are suitable forcoupling with an inner concentric armature or outer ring armature. Theyare common in brushless motors.

The peripheries of the poles, or pole extensions, form substantially acylinder with a plurality of slits parallel or oblique with respect tothe axis of the stator. The peripheries of the poles are connected tothe core by means of pole walls that define corresponding grooves,accessible through the slits. The grooves have to be filled withinsulated lead wire, by creating coils spooled about the pole walls.

At winding, where possible, the wire must pass necessarily through theslits for entering the grooves, and has to be guided to avoid collisionsagainst the edges of the grooves. To this purpose, winding machinesexist having a winding arm, or flier, which rotates causing the wire tofollow a circular trajectory and thus spooling the coil about each polewall. The wire follows the circular trajectory while it is guided in theslits by means of special winding shrouds.

The shrouds are normally of two types, usually enough to wind the mostcommon outwardly spooled multi-pole stators: a couple of lateral guidingplates, which form substantially a channel that aids the wire to enterthe slits; hits are thus avoided of the wire against the edges of thepoles adjacent to the pole being wound; a shroud that allows the wire toovertake the pole making substantially a double slide guide thatdeviates the wire from its own circular trajectory and brings it to windabout the pole wall. The shroud normally is mounted on a support shaft,that is co-axial to the flier and is movable towards/away from the axisof the stator, for laying uniformly the wire helically about the polewall. It can be either a whole block, or formed by two symmetricalmobile halves.

The flier, at winding, rotates about the support shaft of the shroud inorder to have its free end needle that moves in orbital position bothwith respect to the pole being wound and to the shroud that guides thewire in the grooves.

Every portion of wire wound about one or more poles has at least twoends. To assure the electrical contact necessary for the inductioncurrent to pass, which causes the armature to rotate and causes themotor to work, the ends have to be inserted into terminals. Theterminals, in turn, when the motor is assembled, are connected to thecurrent supply circuits for operation of the motor. The terminals areintegrated in a terminal board, which is a body of plastic material thatinsulates axially the stack of sheets that form the ferromagnetic coreof the stator.

The termination, in outwardly spooled multi-pole stators, which allow awinding by means of a flier, is carried out in the way indicatedhereinafter: before winding each pole, or plurality of in-phase poles,the flier cooperates to put the wire ends in the terminals with atermination apparatus; at the end of winding of each pole or severalpoles, the outgoing wire is kept stretched by the flier so that thetermination apparatus can catch it, cooperating with the flier forcarrying out the termination, and finally cutting the wire close to theterminal, gripping the end of the wire that comes from the flier andawaiting the start of next winding step; in the two termination steps asabove described, the movement of the flier is programmed with fractionsof clockwise and/or anticlockwise rotation and with approaching motionof the stator, for cooperating with the termination apparatus andcausing the wire to follow a path that approaches the terminal.

Traditionally, the termination apparatus comprises tools like leadpulls, cutters, clamps, which move in a direction which, normally, isorthogonal to the axis of the stator. When winding stators with innerpoles, by means of a reciprocating shaft with wire distribution needles,owing to the central position of the shaft, the termination apparatuscan be arranged in the easiest way for catching the ends. Instead, whenwinding stators with external poles, with a flier, the position of thetermination tools interferes with the movement of the flier, and theyare therefore complex to arrange.

Furthermore, when the flier moves the wire must be blocked in theterminal, to avoid that it can move away from the terminal at winding inthe first coils. In fact, the movement of the flier keeps the wirestretched while the termination is carried out. The wire can be blocked,in most of cases, at a suitable moment with a special instrument onboard of the machine and that engages the terminal, approachingorthogonally to the axis of the stator.

However when the terminal is located outside, on the external boundaryof the stator, a tool that approaches the terminal, for blocking thewire and avoiding that slides in the terminal, would obstruct the flier,which as above said moves in a orbital position about the pole.

On the other hand, a manoeuvre of terminating carried out withoutblocking the wire is risky, even with a terminal with special autoblocking shape, owing to the tension on the wire stretched by the flier,which can cause it to disengage.

A further problem is that, when introducing an end of wire in aterminal, the end protrudes of a certain amount beyond the terminal, andhas to be trimmed. Thus, an off-cut wire portion would fall at the baseof the machine or, where possible, in a container located underneath.This has the risk that the off-cut portion can sometimes jam into themachine or remain accidentally wound in the stator, causing in bothcases a serious drawback.

SUMMARY OF THE INVENTION

It is therefore object of the present invention to provide a method ofwire termination on outwardly spooled multi-pole stators in which thetermination steps do not obstruct the movement of the flier.

Another object of the present invention is to provide a terminatingdevice that moves without obstructing the movement of the flier duringthe termination.

It is a particular object of the present invention to provide a methodof wire termination on outwardly spooled multi-pole stators, withterminals located outside, where the wire can be blocked with respect tothe terminals during the step of terminating with the aid of the flier.

It is another particular object of the present invention to provide aterminating device that carries out the above method in case ofoutwardly spooled multi-pole stators with terminals arranged on theboundary, directly onto the poles.

It is a further particular object of the present invention to provide aterminating device that carries out this method in case of outwardlyspooled multi-pole stators with terminals arranged within the poles.

It is still another particular object of the present invention toprovide a terminating device wherein an end of wire after theintroduction into the terminals does not protrude from them, orprotrudes in minimum way, without the need of being trimmed and makingan off-cut portion.

According to a first aspect of the invention, a method for wiretermination on outwardly spooled multi-pole stators, wherein the statorsare formed by a core of ferromagnetic sheets, having an axis and aplurality of poles that radially extend defining grooves between them,and by a terminal board that covers in part the core and has a pluralityof terminals, wherein the wire is wound about the poles distributed by arotatable arm and guided by shrouds that move radially with respect tothe stator overlapping the respective polar extension, and whereinbefore and/or after winding wire termination operations are provided ofthe wire in the terminals with the aid of the rotatable arm, theoperations of terminating comprising steps of catching, moving,introducing in the terminals and cutting a portion of wire, has thecharacteristic that the steps of catching, moving, introducing andcutting the wire occur by means of a single multifunctional instrumenthaving an axis parallel to the axis of the stator, capable of carryingout a plurality of movements parallel to and/or rotations about saidaxis.

Preferably, the axis of the multifunctional instrument is incident tothe stator.

Preferably, the step of introducing the wire comprises, before startingwinding step, a step of creating a bridge of wire between a clamp and ataker-in element, and a step of introducing the wire bridge in theterminal by translating the bridge parallel to the axis. The step ofcreating the bridge can be carried out by rotating the clamp and thetaker-in element about the axis.

Advantageously, the step of cutting the wire is carried out by bringinga blade parallel to the axis up to intersecting the wire, kept by aclamp.

The step of cutting the wire being associated to a movement of foldingthe portion of cut wire protruding from a terminal to bend along theterminal side before the start of winding.

The portion of cut wire bent along the terminal side, advantageously, iskept pressed against the terminal at least during the first windingphases. In a preferred embodiment, when the terminal is arrangedperipherally on the polar extension, the portion of cut wire is keptpressed elastically by an element associated to the shroud that extendsfrom the shroud in a direction orthogonal to the axis.

Preferably, the step of catching the wire, when after winding a portionof wire is stretched between the flier and a spooled coil, is carriedout by translating a clamp parallel to the axis up to a predeterminedposition, opening the clamp, rotating the flier until the stretched wireportion does not intersect the predetermined position, closing theclamp.

The steps of catching the wire and of terminating can be aided byindexing the stator about its own axis.

Advantageously, a step is provided of bringing the portion of wire tothe predetermined position by a protruding element that rotatescoaxially to the clamp and intersects the portion of wire.

According to another aspect of the invention, a method for wiretermination on outwardly spooled multi-pole stators, wherein the statorshave a core from which radially extend a plurality of pole walls withpoles defining grooves between them, the pole extensions havinglongitudinal edges, which define the slits for entering the grooves, andcircumferential edges that define the height of the stator, the poleshaving terminals, wherein the wire is wound about the pole walls bymeans of a rotatable arm guided by shrouds that overlap thecircumferential edges of the pole and that move along a radial directionwith respect to the stator for laying the wire along the pole walls, andwherein the rotatable arm carries out operations of wire termination onthe wire ends in the terminals before and/or after winding, whosecharacteristic is that a step is provided of blocking the wire ends nearto or at the terminals, the step of blocking being carried out in adirection parallel to said radial direction.

According to still another aspect of the invention, in a stator windingmachine of the above type a device is provided for wire termination onoutwardly spooled multi-pole stators, wherein the stators are formed bya core of ferromagnetic sheets, having an axis and a plurality of polesthat radially extend defining grooves between them, and by a terminalboard that covers in part the core and has a plurality of terminals,associated to a stator winding machine comprising at least a flier and ashroud that moves radially with respect to the stator overlapping therespective polar extension.

The device has means for terminating wire ends in the terminals with theaid of the flier and of an index motion of the stator, and has thecharacteristic of having an axis parallel to the axis of the stator andof being equipped with means for catching, moving, introducing in theterminals and cutting a portion of wire associated to means for theirmovement in a direction parallel to said axis.

The means for introducing the wire can comprise means for creating abridge of wire between a clamp and a taker-in element, and means forintroducing in a terminal the bridge by translating the bridge parallelto the axis. Preferably, the means for creating the bridge comprisemeans for rotating the clamp and the taker-in element about the axis.

Advantageously, the means for cutting the wire comprise a blade slidingparallel to the axis up to intersecting the wire, kept by the clamp.

The means for cutting the wire can be associated to a deflector movableparallel to the axis and suitable for folding the portion of cut wireprotruding from a terminal bending along an end of same before the startof winding.

When the terminal is arranged peripherally on the pole means can beprovided for pushing the portion of cut wire bent along the terminalside at least during the first winding phases. Preferably, such pushingmeans comprise an element associated to the shroud that extends from theshroud in a direction orthogonal to the axis, the pushing element beingbiased by a spring.

Advantageously, the means for catching the wire comprise a clamp movableparallel to the axis up to a predetermined position, the clamp beingformed by a first and a second gripper suitable for closing on eachother with movement parallel to the axis.

Preferably, a second deflector is provided for bringing a portion ofwire stretched between the flier and the stator to the predeterminedposition, the second deflector comprising a protruding element thatrotates coaxially.

According to a further aspect of the invention, a stator winding machineof the above type, comprising a rotatable arm suitable for winding thewire about the pole walls and shrouds that approach the circumferentialedges of the polar extension, overtaking them and moving along an axisthat is radial with respect to the stator for spooling the wire alongthe pole walls, has the characteristic that lock means are provided ofthe wire ends near to or at the terminals, the lock means moving in adirection parallel to said radial axis and having an end suitable forpushing an end against the stator near to or at the terminal.

Preferably, the shroud comprises a first portion that approaches formoutside the polar extension, allowing a second portion to overtake thecircumferential edges of the pole and move along the radial axis, thelock means being mounted on the first portion.

Advantageously the lock means comprise a pin parallel to the radial axisand slidingly engaged in the first portion, being provided a resilientelement opposing to the sliding of the pin in the first portion.

BRIEF DESCRIPTION OF THE DRAWINGS

Further characteristics and the advantages of the method and of thedevice according to the invention for winding of multi-pole stators willbe made clearer with the following description of an embodiment thereof,exemplifying but not limitative, with reference to the attacheddrawings, wherein:

FIGS. 1 and 2 show, respectively, a top plan view and a side elevationalview of an outwardly spooled multi-pole stator with terminals on theboundary of the pole extensions;

FIG. 3 is an elevational side view of a terminating device on multi-polestators according to a first embodiment of the invention;

FIG. 4 is an elevational front view of the device of FIG. 3;

Figures from 5 to the 18 show the succession of the steps to provide thewire termination on the multi-pole stator of FIGS. 1 and 2 with theapparatus of FIGS. 3 and 4;

FIG. 19 shows in a top plan view an outwardly spooled multi-pole statorwith inner terminals;

FIG. 20 shows a cross sectional view of the stator of FIG. 19 accordingto arrows XX-XX;

FIG. 21 is an elevational side view of the terminating device onmulti-pole stators according to an alternative embodiment;

FIG. 22 is a cross sectional view according to arrows XXII-XXII of thedevice of FIG. 21;

Figures from 23 to 36 show the succession of steps for wire terminationon a multi-pole stator, according to an alternative embodiment.

DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT

With reference to FIGS. 1 and 2, an outwardly spooled multi-pole stator1 has a core formed by a stack of ferromagnetic sheets 2, having an axisof symmetry 7 and a plurality of poles 6 that radially extend defininggrooves between them. Stack 2 is in part covered by a terminal board 3that has a plurality of terminals 4. Terminals have a slit wherein hasto be inserted a terminal of wire spooled about poles 6.

A winding step, for example, is shown in FIG. 14. Wire 15 is wound aboutpoles 6 distributed by a rotatable arm 10, or flier, having a needle end11. Wire 15 slides through flier 11, while it is kept stretched and fedby means not shown, and known to a person skilled in the art. Atwinding, wire is guided by shrouds 16 that move radially with respect tostator 1 thus overlapping the respective pole 6. In FIG. 14, a pole 6already wound with a coil 5 is shown on the right edge of the stator,with an end 5′ that engages a terminal 4.

Before and after winding wire termination operations are provided on theends of wire 15 into terminals 4 with the aid of flier 10, carried outby an apparatus equipped with a terminating device shown in FIGS. 3 and4. Such operations, according to invention, are described hereinafter.

Device 20 comprises a first deflector 21, a second deflector 22, a blade23, and a clamp formed by a movable gripper 24 and a fixed gripper 25,the former being suitable for closing onto the latter for gripping wire15. Device 20 can carry out steps of catching, moving, introducing andcutting wire 15 with movements parallel to its own axis 27, whichcoincide or is parallel to axis 7 of stator 1.

The device 20 can translate along axis 27 and rotate about axis 27 owingto a motor 24′. Fixed gripper 25 remains integral to it, which guidesother tools 21, 22, 23, 24 as hereinafter indicated. Other tools canthen move parallel to axis 27, and in particular: movable gripper 24 isoperated by actuator 23′; blade 23 can move owing to actuator 23′ same;first deflector 21 is operated by actuator 21′; second deflector 22 canmove owing to actuator 22′.

The drives are not shown in detail since they comprise motors and linearactuators of known type to a man of the art.

The steps of termination, according to the invention, are the following:before starting a winding cycle on one pole of a stator without previouswindings, or on which previous winding step has already been made a of acoil 5, with end 5′ in a terminal 6, wire 15 is kept by gripper 24-25 ina way shown in FIG. 5.

Then, first deflector 21 (FIG. 6) is lowered, and then the whole device20 (FIG. 7) is lowered up to a step of creating a bridge 15′ of wire 15(FIG. 8) between gripper 24-25 and deflector 21. This is carried out bymeans of rotating device 20 about axis 27.

A step follows of introducing into a terminal 4 bridge 15′ of wire 15 bytranslating along axis 27 (FIG. 9). A movement below gripper 24-25causes bending of end 5′ along external wall of terminal 4, as shown inFIG. 10. At this point, end 5′ is in terminal 4, but the tension of wire15, and a further movement of flier 10 for starting winding could causethe wire to disengage from terminal 4. For this reason (FIG. 11), firstdeflector 21 remains in lowered position, bearing the tension of wire15. At the same time the remainder of device 20 has moved upwards.

Then, as shown in FIG. 12, shroud 16 is approached to stator and isready for winding. In this step, an end 5′ of wire 15 is kept pressedagainst terminal 4 by a pushing element 17, associated to a spring 18,and integral to the body of shroud 16. Owing to the presence of pusher17, first deflector 21 can raise (FIG. 13) and device 20 can rotateturning again to the starting position.

Pusher 17 keeps an end 5′ pressed against terminal 4, so that windingcan start (FIG. 14) and at winding of the first coils, the tension ofwire 15 not pull an end 5′ out from terminal 4. At winding (FIG. 14)shroud 16 the wire about poles, and its reciprocation towards/away fromaxis of stator does not cause pusher 17 to loose contact from end 5′,nor it creates interferences with the stator, owing to spring 18.

At the end of winding, shroud withdraws, and the stator, in a way notshown, is subject to an index movement for winding a pole not next tothat already wound. The wire, in this step, is not cut. Winding startsagain, and eventually shroud 20 withdraws again (FIG. 15). Wire 15, thatis stretched between flier 10 and stator, and to be cut and terminatedinto respective terminal 4.

Then, device 20 is lowered, with gripper 24-25 open, in order to engagewire 15. A movement of flier 10 can make this step easier. Then seconddeflector 22 is lowered and (FIG. 16) stops at the height of terminal 4.Then flier 10 is lowered that causes the wire to enter the terminal(FIG. 17), and at same time, blade 22 cuts wire between gripper 24-25and the terminal, so that an end 5″ is cut close to terminal 4 and theother cut end of wire 15 remains on gripper 24-25. Finally, FIG. 18,device 20 moves up again, back to the position of FIG. 5, with stator 1spooled with one or more coils 5 about respective poles 6, as well aswith ends 5′ and 5″ inserted into respective terminals 4.

It must be noted that shroud 16, as shown in the Figures, can bereplaced by a shroud much easier, of the type formed by a single shieldwith central opening through which the pole of stator passes whenspooling. In this case, pushing element 17 is equally present, arrangedin the central opening of this type of shroud.

A embodiment of the method according to the invention relates to windingan outwardly spooled multi-pole stator 41, FIGS. 19 and 20, that has acore formed by a stack of ferromagnetic sheets 2, an axis of symmetry 42and a plurality of poles 46 that radially extend defining groovesbetween them. The stack 42 is, in part, covered by a terminal board 43that has a plurality of terminals 44. The terminals 44 have a slitwherein an end 45′ has to be inserted of wire 45 spooled about the poles46. The terminals 44, contrarily to the case of FIGS. 1 and 2, arearranged within the poles 46.

A winding step, for example, is shown in FIG. 32. The wire 15 is woundabout the poles 46 distributed by flier 10. Also in this case, beforeand after winding wire termination operations are provided of the wireends 15 into the terminals 44, with the aid of flier 10, carried out byan apparatus equipped with a terminating device 50 shown in FIGS. 21 and22. Such operations, according to the invention, are describedhereinafter.

The device 50 comprises a first deflector 51, a second deflector 52, ablade 53, and a clamp formed by a movable gripper 54 and a fixed gripper55, the latter being suitable for closing on the former for grippingwire 15. The device 50 can carry out the steps of catching, moving,introducing and cutting the wire 15 with movements parallel to its ownaxis 27, which coincides with or is parallel to axis 7 of stator 1.

The device 50 can translate along axis 57 and rotate about axis 57 owingto a motor 50′. Fixed gripper 55 remains integral to it. The other toolscan then move parallel to axis 57, and in particular: movable gripper 54is operated by actuator 54′; blade 53 can move integrally to movablegripper always owing to actuator 54′; first deflector 51 is operated byactuator 51′; second deflector 52 can move owing to actuator 52′,partially hidden in the figure.

In a way similar to the previous case, the steps of termination,according to the invention, are the following: before starting a windingcycle on one pole of a stator without windings, or on which have alreadybeen spooled some coils 45, with end 45′ in a terminal 46, the wire 15is kept by the gripper 54-55 in the way shown in FIG. 23.

Then, the first deflector 51 (FIG. 24) is lowered, and then all thedevice 50 (FIG. 25) is lowered up to a step of creating a bridge 15′ ofwire 15 between the gripper 54-55 and the deflector 51. A step followsof introduction into a terminal 44 of bridge 15′ of wire 15 bytranslation along the axis 57 (FIG. 26).

The rotation of flier 10 about an angle orients correctly wire 15 forintroducing it in an end 44 (FIG. 27). A movement below the gripper54-55 causes end 45′ to bend along the inner wall of terminal 44, asshown in FIG. 28. At this point, an end 45′ is in terminal 44, but thetension of wire 15, and the following movement of flier 10 for startingwinding, could cause the wire to disengage from terminal 44. For thisreason (FIG. 29), first deflector 51 remains in the lowered position,bearing the tension of wire 15. At the same time the remainder of device50 has moved upwards.

Then, as shown in FIG. 30, the shroud 16 is approached to the stator andis ready for winding. In this step, an end 45′ of wire 15 is keptpressed against the inner face of terminal 44 from the lower extremityof first deflector 51, so that winding can start and, when spooling thefirst coils (FIG. 31), the tension of the wire 15 cannot pull out an end45′ from the terminal 44. At winding (FIG. 32), moreover, the firstdeflector 21 moves up.

At the end of winding, the shroud withdraws, and the stator, in a waynot shown, is subject to an index movement for winding a pole differentfrom that already wound. The wire, in this step, is not cut. Windingstarts again, and eventually the shroud 50 withdraws again (FIG. 33).The wire 15 that is stretched between the flier 10 and the stator 41 hasto be cut and terminated in the respective terminal 44.

Then, device 50 is lowered, with gripper 54-55 open and second deflector52 rotated about the axis 57 at the edge that is oriented towards theshroud 16, in order to engage wire 15. A movement of flier 10 can makethis step easier. Second deflector 52 then rotates (FIG. 34) and stopswhen the wire is aligned with terminal 44 and has entered gripper 54-55.

Then (FIG. 35) flier 10 is lowered that causes the wire to enter theterminal 44, and, at the same time, blade 52 cuts the wire betweengripper 54-55 and terminal 44, so that an end 45″ is cut close toterminal 44 and the other cut end of wire 15 remains gripper 54-55.

Finally, FIG. 36, the device 50 moves up again, back to the position ofFIG. 45, with stator 41 wound of other coils 45 about the respectivepoles 46, and the ends 45′ and 45″ inserted into the respectiveterminals 44. The deflector 52 rotates in a way not shown for returningthe wire in the position of FIG. 23.

The foregoing description of a specific embodiment will so fully revealthe invention according to the conceptual point of view, so that others,by applying current knowledge, will be able to modify and/or adapt forvarious applications such an embodiment without further research andwithout parting from the invention, and it is therefore to be understoodthat such adaptations and modifications will have to be considered asequivalent to the specific embodiment. The means and the materials torealise the different functions described herein could have a differentnature without, for this reason, departing from the field of theinvention. It is to be understood that the phraseology or terminologyemployed herein is for the purpose of description and not of limitation.

1. A method for lead wire termination on outwardly spooled multi-polestators, wherein the multi-pole stators are formed by a core offerromagnetic sheets, having an axis and a plurality of poles thatradially extend defining grooves between them, and by a terminal boardthat covers in part the core and has a plurality of terminals, whereinthe lead wire is wound about said plurality of poles distributed by aflier and guided by shrouds that move radially with respect to themulti-pole stators, overlapping the respective polar extension, andwherein, before and/or after winding, wire termination operations areprovided for the wire ends in said terminals with the aid of a rotatablearm, said termination operations comprising the steps of catching,moving, introducing in the terminals and cutting a portion of wire,characterised in that said steps of catching, moving, introducing andcutting said portion of wire occurs by means of a single multifunctionalinstrument having an axis parallel to the axis of the stator, capable ofcarrying out a plurality of movements parallel to and/or rotations aboutsaid axis.
 2. The method according to claim 1, wherein, the axis of themultifunctional instrument is incident to the stator.
 3. The methodaccording to claim 1, wherein said step of introducing said wirecomprises, before starting a winding step, a step of creating a bridgeof wire between a clamp and a taker-in element, and a step ofintroducing the wire bridge in the terminal by translating said bridgeparallel to said axis.
 4. The method according to claim 1, wherein saidstep of creating the bridge can be carried out by rotating the clamp andthe taker-in element about said axis.
 5. The method according to claim1, wherein said step of cutting the wire is carried out by bringing ablade parallel to said axis up to intersecting said wire, kept by aclamp.
 6. The method according to claim 1, wherein said step of cuttingthe wire is associated to a movement of folding the portion of cut wireprotruding from a terminal to bend along a terminal side before thestart of winding.
 7. The method according to claim 1, wherein saidportion of cut wire bent along the terminal side is kept pressed againstthe terminal at least during the first winding phases.
 8. The methodaccording to claim 7, wherein when the terminal is arranged peripherallyon the polar extension, the portion of cut wire is kept pressedelastically by an element associated to the shroud that extends from theshroud in a direction orthogonal to said axis.
 9. The method accordingto claim 1, wherein said step of catching the wire, when after winding aportion of wire is stretched between said flier and a spooled coil, iscarried out by translating a clamp parallel to said axis up to apredetermined position, opening said clamp, rotating the flier untilsaid stretched wire portion does not intersect said predeterminedposition, closing said clamp.
 10. The method according to claim 1,wherein a step is provided of bringing said portion of wire to saidpredetermined position by a protruding element that rotates coaxially tosaid clamp and intersects said portion of wire.
 11. A method for wiretermination on outwardly spooled multi-pole stators, wherein the statorshave a core from which a plurality of pole walls radially extend withpoles defining grooves between them, said pole extensions havinglongitudinal edges, which define the slits for entering the grooves, andcircumferential edges that define the height of the stator, said poleshaving terminals, wherein a wire is wound about said pole walls by meansof a rotatable arm guided by shrouds that overlap the circumferentialedges of the pole and that move along an axis that is radial withrespect to the stator for laying the wire along the pole walls, andwherein said rotatable arm carries out operations of wire termination onthe wire ends in said terminals before and/or after winding, whosecharacteristic is that a step is provided of blocking said wire endsnear to or at said terminals, said step of blocking being carried out ina direction parallel to said radial axis.
 12. A device for wiretermination on outwardly spooled multi-pole stators, wherein the statorsare formed by a core of ferromagnetic sheets, having an axis and aplurality of poles that radially extend defining grooves between them,and by a terminal board that covers in part the core and has a pluralityof terminals, associated to a stator winding machine comprising at leasta flier and a shroud that moves radially with respect to the statoroverlapping the respective polar extension, means for terminating wireends in said terminals with the aid of said flier, said means forterminating comprising means for catching, moving, introducing in theterminals and cutting a portion of wire, characterised in that saidmeans for catching, moving, introducing and cutting said portion of wireare integrated in a single multifunctional instrument having an axisparallel to the axis of the stator, capable of carrying out a pluralityof movements parallel to and/or rotations about said axis.
 13. Thedevice according to claim 12, wherein said means for introducing saidwire comprises means for creating a bridge of wire between a clamp and ataker-in element, and means for introducing into a terminal said bridgeby translating said bridge parallel to said axis.
 14. The deviceaccording to claim 12, wherein said means for creating the bridgecomprises means for rotating said clamp and said taker-in element aboutsaid axis.
 15. The device according to claim 12, wherein said means forcutting the wire comprises a blade sliding parallel to said axis up tointersecting said wire, kept by said clamp.
 16. The device according toclaim 12, wherein said means for cutting the wire are associated to adeflector movable parallel to said axis and suitable for folding theportion of cut wire protruding from a terminal to bend along theterminal side before the start of winding.
 17. The device according toclaim 16, wherein, when the terminal is arranged peripherally on thepole, means are provided for pushing said portion of cut wire bent alongthe terminal side at least during the first winding phases.
 18. Thedevice according to claim 17, wherein said pushing means comprises anelement associated to the shroud that extends from the shroud in adirection orthogonal to said axis, said pushing element being biased bya spring.
 19. The device according to claim 12, wherein said means forcatching the wire comprises a clamp movable parallel to said axis up toa predetermined position, said clamp being formed by a first and asecond gripper suitable for closing on each other with movement parallelto said axis.
 20. The device according to claim 19, wherein a seconddeflector is provided for bringing a portion of wire stretched betweensaid flier and said stator to said predetermined position, said seconddeflector comprising a protruding element that rotates coaxially to saidclamp and intersects said portion of wire.
 21. A device for wiretermination on outwardly spooled multi-pole stators, associated to astator winding machine, which comprises a rotatable arm suitable forwinding a wire about said pole walls and shrouds that approach thecircumferential edges of the polar extension, overtaking them and movingalong an axis that is radial with respect to said stator for laying thewire along the pole walls, characterised in that block means areprovided for said wire ends near to or at said terminals, said blockmeans moving in a direction parallel to said radial axis and having anend suitable for pushing said wire end against said stator near to or atsaid terminal.
 22. A device according to claim 21, wherein said shroudcomprises a first portion that approaches form outside the pole,allowing a second portion to overtake the circumferential edges of thepole and to move along said radial axis, said block means being mountedon said first portion.
 23. A device according to claim 22, wherein saidblock means comprises a pin parallel to said axis that is radial andslidingly engaged in said first portion, a resilient element beingprovided that biases the sliding of said pin in said first portion.